Cushion support



B. CHRISTMAS Aug. 8, 1933.

CUSHION SUPPORT Filed April 13. 1932 VIH 2v un .f o f In//////////////S, ;i/i 3 A ATTORNEY- Patented Aug. 8, 1933 UNITED STATESPATENT .OFFICE 6 Claims.

This invention relates to cushion supports and is herein illustrated inthe form of a tip adapted to be removably put upon the leg of a chair orupon the leg of a device subject to vibration like the leg of arefrigerator.

The leg of an ordinary chair is solid to the bottom and rests upon ahard iloor so firmly that anyone sitting down in its experiences a shocksuch as is experienced when the foot comes down on a hard pavement andthe body receives the shock of striking the pavement with a metal cladheel. Moreover, when a device such as an electric refrigerator havingmoving parts, rests upon a hard floor, the usual metal legs transmit tothe door the vibration of those moving parts, the vibrations includingboth sensible vibrations and sound vibrations, thus making the devicenoisy and in other ways annoying.

According to the present invention, these and other difficulties areovercome by interposing between the floor and the metal or wooden leg ofa cushion sponge rubber, large enough to support the weight of thedevice without such compression as will destroy its resiliency.

In the form of the invention herein shown, the rubber cushion is shownas part of a removable rubber grip which embraces the leg and is ofsuicent firmness where it grips the leg to flrmly hold the leg in placeupon the cushion of sponge rubber. Other features and advantages willhereinafter appear.

In the accompanying drawing,

Figure 1 shows the leg of a chair supported on a cushion of the presentinvention.

Figure 2 shows the cushion and one form of rubber grip for attaching itto a leg.

Figure v3 is a sectional view showing a leg, the cushion and grip on alarger scale, and

Figure 4 is a fragmentary view of an electric refrigerator.

A chair having a seat 1, a leg 2, and a rung 3, is supported on a floor4 by a cushion 5 of sponge rubber which is firmly attached to a rubbergrip 6, embracing the lower end 7 of the leg 2 of the chair. Asanoreclearly shown in Figures 2 and 3, the cushion 5, consists of a smoothfaced hemispherical body of sponge rubber having a projection 8 on thefiat surface of the hemisphere provided ,with a bevelled edge 9, setback from a rabbet 10 around the periphery of the flat surface. Theprojection 8 is adapted to fit in a corresponding depression 11 in therubber grip 6, so that the top surface or nearly top surface 12 of theyprojection 8, lies against the depressed flat surface 13 of thedepression 11 in the grip.

It is found that -the cushion 5 may be sufllciently strongly held to thegrip 6 by means of a suitable cement, if it is desired to unit the partsafter vulcanization is complete. It is found that the sponge rubber 5should be of such consistency 60 that a hemisphere having a diameter ofnearly 3- inches can be compressed by a strong man between his thumb andforefinger to about half or less than its normal thickness, withoutundue strain.

The sponge rubber is preferably of a very ne texture with bubbles almostthe size of pinheads. The grip 6 is made of very different rubber,preferably approximately that used for tire treads, and for a chair hasbeen found satisfactory in one size to have 11/8 inch opening, with awall approximately an eighth of an inch thick at the top and 21A inchesdeep extending out as a pyramid and forming a frustro-conical structure,so that it is 2 inches across (outside measurement) 75 at the bottom ofthe socket opening, thus giving a wall thickness of approximately of aninch thick at the bottom 15 of `the socket 14. A little below this pointthe grip portion 6 rounds out to complete the curve of the hemisphere ofthe cushion 5. Between the bottom 15 of the socket 14, and the face ofthe depression 13, there is a wall 16 nearly an inch thick formed of thesame continuous body of rubber which forms the socket 14. This leaves astiff wedge shaped annular rim 17 about a quarter of an inch deep andnearly as thick at its base to form the depression 1l, and help hold theedge of the sponge cushion 5.

It is found that chairs provided with these tips give the samecomfortable sensation that is attained by sitting down in a cushionedrocking chair, the slight sideways or forward and back yielding of thecushion 5, greatly adding to the sensation of comfort.

It is also found that such a tip is extremely effective on electricalrefrigerators, eliminating most of the noise and floor vibration. Madeas above described, it is found that three sizes of sockets 14 withcorresponding proportions in the walls of the grip 6 and-of the cushion5, give a 100 satisfactory range to fit practically all householdfurniture and refrigerators.

Having thus described certain embodiments of the invention, what isclaimed is:

1. A support for an article of furniture including a rubber spongecushion having a smooth face and adapted to support the furniture fromthe iloor, and a socket of relatively tough rubber adapted to engage thefurniture and held to the sponge cushion.

2. A support for an article of furniture including a rubber spongecushion having -a smooth face of relatively large area and adapted tosupport the furniture from thefloor, and a socket of relatively toughrubber adapted to engage the furniture and held to the sponge cushion.

3. A support for an article of furniture including a rubber spongecushion havinga smooth face of relatively large area-and adaptedtofsupport the furniture from the floor, and a socket of relativelytough rubber having walls about M; inch thick and increasing inthickness toward the bottom and adapted to engage the furniture and heldto the sponge cushion.

4. A support for an article of furniture including a rubber spongecushion having a smooth face and adapted to support the furniture fromthe oor, and a. socket of relatively tough rubber havingv a solid bottomas thick as its walls and v binding the socket sides together andforming broad support for the sponge.

5. A support for an article .of furniture including a rubber spongehaving a smooth face adapted to rest upon'a floor, and -a tough rubberfrus-

